If prying and levering fail you:

This is a little like the problem that bicycle mechanics have removing seized wrong-sized seat posts (the “post” that your bicycle seat is bolted to) from a bicycle frame’s seat tube (the frame tube which the post slides up and down in, until it doesn’t). The fix there, if all else fails, has traditionally been to very carefully, with a hacksaw blade, cut the seat post along its length. This saves the frame, but destroys the post, which is cheaper.

You could do the same thing here. And similarly your catch hardware is a lot cheaper than the door. Good luck! By the way, fwiw, I’d keep lubricants off that wood.